public String getTelephoneNumber() returns the telephone
      number from the person's profile.
    Attention: Introduced in SDK version 1.3.
  Parameters
None
Returns
Returns a String representing the telephone number from a person's profile. Returns null if not available.
Example
    PersonService ps = session.getServiceRegistry().getPersonService();
    
    Person p = ps.getPerson("joeuser");
    
    Log.d(TAG, "phone: " + p.getTelephoneNumber());
      
      Would produce output such as the following:
phone: 1234-56789